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The reason for this is that http://crrev.com/245412 introduces a dependency of Chrome's src/build/gyp_chromium to src/tools/find_depot_tools.py, which we don't have synced in WebRTC (src/tools is very big). Offline discussions shows that we cannot rely on syncing individual subdirectories from Chrome in the future, but maintaining our own gyp_webrtc file will at least buy us some time for now, so we can roll past that chromium_revision in WebRTC DEPS. Overview of differences between gyp_webrtc and gyp_chromium (and how we previously used gyp_chromium): * No .gyp file needs to be passed (defaults to all.gyp) * CHROMIUM_GYP_FILE is ignored (i.e. cannot be used to specify an alternate .gyp file to process) * Ninja is used by default on all platforms unless GYP_GENERATORS is set. * Gyp syntax check is always on * Gyp circular dependency check is always on * No support for automatic toolchain detection on Windows. * --depth argument is no longer needed since calculated by the script. * Support for a webrtc.gyp_env file sitting next to the .gclient file in the top dir of checkout, which can be used to override Gyp variables similar to chromium.gyp_env. * SKIP_WEBRTC_GYP_ENV can be set to skip reading webrtc.gyp_env. BUG=2863 TEST=Ran and verified behavior on Linux with: gclient runhooks webrtc/build/gyp_webrtc webrtc/build/gyp_webrtc -Dextra_gyp_flag=0 . build/android/envsetup.sh && gclient runhooks SKIP_WEBRTC_GYP_ENV=1 webrtc/build/gyp_webrtc GYP_GENERATORS=make webrtc/build/gyp_webrtc The patch also passes runhooks and compile step on all trybots. R=andrew@webrtc.org, fischman@webrtc.org Review URL: https://webrtc-codereview.appspot.com/7759004 git-svn-id: http://webrtc.googlecode.com/svn/trunk@5467 4adac7df-926f-26a2-2b94-8c16560cd09d